DuplicateUnitError (cq/store.py)

Exception for duplicate knowledge unit IDs, abstracting driver errors.

# Source: https://github.com/mozilla-ai/cq | License: Apache-2.0 | Copyright You must retain, in the Source form of any Derivative Works
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"""Local persistence for cq: the Store SPI and its SQLite default.

The ``Store`` Protocol is the narrow contract the Client depends on; the
default ``SqliteStore`` implements it over SQLite following the XDG Base
Directory spec. Default location: $XDG_DATA_HOME/cq/local.db
(~/.local/share/cq/local.db). The store auto-creates the database
directory and schema on first use and implements the context manager
protocol for deterministic resource cleanup.

``create_store`` resolves a connection-string URL to a concrete store, and
``rank_candidates`` is the shared ranker any implementation can reus

... (truncated -- full source via MCP)